X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FMachineLoopInfo.cpp;h=269538b31d0b9442c64ee33b7a367d55430a7ec0;hb=fdb5a8617996a20370756962e34c2e80176d6e87;hp=907cc9e706e1cd2fc5bec2899cfc05ea33048038;hpb=e4ad9c70e4a1261c212b11623d99e2477ef02783;p=oota-llvm.git

diff --git a/lib/CodeGen/MachineLoopInfo.cpp b/lib/CodeGen/MachineLoopInfo.cpp
index 907cc9e706e..269538b31d0 100644
--- a/lib/CodeGen/MachineLoopInfo.cpp
+++ b/lib/CodeGen/MachineLoopInfo.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Owen Anderson and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -16,26 +16,65 @@
 
 #include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/MachineDominators.h"
-
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/Support/Debug.h"
 using namespace llvm;
 
-TEMPLATE_INSTANTIATION(class LoopBase<MachineBasicBlock>);
-TEMPLATE_INSTANTIATION(class LoopInfoBase<MachineBasicBlock>);
+namespace llvm {
+#define MLB class LoopBase<MachineBasicBlock, MachineLoop>
+TEMPLATE_INSTANTIATION(MLB);
+#undef MLB
+#define MLIB class LoopInfoBase<MachineBasicBlock, MachineLoop>
+TEMPLATE_INSTANTIATION(MLIB);
+#undef MLIB
+}
 
 char MachineLoopInfo::ID = 0;
 static RegisterPass<MachineLoopInfo>
 X("machine-loops", "Machine Natural Loop Construction", true);
 
+const PassInfo *const llvm::MachineLoopInfoID = &X;
+
 bool MachineLoopInfo::runOnMachineFunction(MachineFunction &) {
   releaseMemory();
-  LI->Calculate(getAnalysis<MachineDominatorTree>().getBase());    // Update
+  LI.Calculate(getAnalysis<MachineDominatorTree>().getBase());    // Update
   return false;
 }
 
 void MachineLoopInfo::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.setPreservesAll();
   AU.addRequired<MachineDominatorTree>();
+  MachineFunctionPass::getAnalysisUsage(AU);
+}
+
+MachineBasicBlock *MachineLoop::getTopBlock() {
+  MachineBasicBlock *TopMBB = getHeader();
+  MachineFunction::iterator Begin = TopMBB->getParent()->begin();
+  if (TopMBB != Begin) {
+    MachineBasicBlock *PriorMBB = prior(MachineFunction::iterator(TopMBB));
+    while (contains(PriorMBB)) {
+      TopMBB = PriorMBB;
+      if (TopMBB == Begin) break;
+      PriorMBB = prior(MachineFunction::iterator(TopMBB));
+    }
+  }
+  return TopMBB;
+}
+
+MachineBasicBlock *MachineLoop::getBottomBlock() {
+  MachineBasicBlock *BotMBB = getHeader();
+  MachineFunction::iterator End = BotMBB->getParent()->end();
+  if (BotMBB != prior(End)) {
+    MachineBasicBlock *NextMBB = llvm::next(MachineFunction::iterator(BotMBB));
+    while (contains(NextMBB)) {
+      BotMBB = NextMBB;
+      if (BotMBB == llvm::next(MachineFunction::iterator(BotMBB))) break;
+      NextMBB = llvm::next(MachineFunction::iterator(BotMBB));
+    }
+  }
+  return BotMBB;
 }
 
-// Ensure this file gets linked when MachineLoopInfo.h is used.
-DEFINING_FILE_FOR(MachineLoopInfo)
\ No newline at end of file
+void MachineLoop::dump() const {
+  print(dbgs());
+}